Subversion Repositories openrisc_2011-10-31

;; Constraint definitions for Renesas M32R cpu for GNU C compiler

;; Copyright (C) 2007 Free Software Foundation, Inc.

;;

;; This file is part of GCC.

;;

;; GCC is free software; you can redistribute it and/or modify it

;; under the terms of the GNU General Public License as published

;; by the Free Software Foundation; either version 3, or (at your

;; option) any later version.

;; GCC is distributed in the hope that it will be useful, but WITHOUT

;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public

;; License for more details.

;;

;; You should have received a copy of the GNU General Public License

;; along with GCC; see the file COPYING3.  If not see

;; .

;; The letters I, J, K, L, M, N, O, P in a register constraint string

;; can be used to stand for particular ranges of immediate operands.

;; The letters Q, R, S, T, U are used to segregate specific types of

;; operands, usually memory references, for the target machine.

;;

;; I is used for 8-bit signed immediates.

;; J is used for 16-bit signed immediates.

;; K is used for 16-bit unsigned immediates.

;; L is used for 16-bit immediates left shifted by 16 (sign ???).

;; M is used for 24-bit unsigned immediates.

;; N is used for 8-bit signed immediates for compares

;;   (values in the range -127 to +128).

;; O is used for 5-bit unsigned immediates (shift count).

;; P is used for 16-bit signed immediates for compares

;;     (values in the range -32767 to +32768).

;;

;; Q is for symbolic addresses loadable with ld24.

;; R is for symbolic addresses when ld24 can't be used.

;; S is for stores with pre {inc,dec}rement

;; T is for indirect of a pointer.

;; U is for loads with post increment.

;; W is used for an immediate value of 0.

;;

;; Register constraints

(define_register_constraint "a" "ACCUM_REGS"

  "@internal")

(define_register_constraint "c" "CARRY_REG"

  "@internal")

;; Integer constraints

(define_constraint "I"

  "8-bit signed immediate."

  (and (match_code "const_int")

       (match_test "ival >= -0x80 && ival <= 0x7f")))

(define_constraint "J"

  "16-bit signed immediate."

  (and (match_code "const_int")

       (match_test "ival >= -0x8000 && ival <= 0x7fff")))

(define_constraint "K"

  "16-bit unsigned immediate."

  (and (match_code "const_int")

       (match_test "(unsigned HOST_WIDE_INT) ival <= 0x0000ffff")))

(define_constraint "L"

  "16-bit signed immediate left shifted by 16."

  (and (match_code "const_int")

       (match_test "(ival & 0xffff) == 0")

       (match_test "(ival >> 16) >= -0x8000 && (ival >> 16) <= 0x7fff")))

(define_constraint "M"

  "24-bit unsigned immediate."

  (and (match_code "const_int")

       (match_test "(unsigned HOST_WIDE_INT) ival <= 0x00ffffff")))

(define_constraint "N"

  "8-bit signed immediate for compare."

  (and (match_code "const_int")

       (match_test "ival >= -127 && ival <= 128")))

(define_constraint "O"

  "5-bit unsigned immediate."

  (and (match_code "const_int")

       (match_test "ival >= 0 && ival < 32")))

(define_constraint "P"

  "16-bit signed immediate for compare."

  (and (match_code "const_int")

       (match_test "ival >= -0x7fff && ival <= 0x8000")))

;; Floating-point constraints

(define_constraint "G"

  "Double constant loadable with 2 ldi insns."

  (and (match_code "const_double")

       (match_test "easy_di_const (op)")))

(define_constraint "H"

  "Double constant loadable with movdf."

  (and (match_code "const_double")

       (match_test "easy_df_const (op)")))

;; Extra constraints

(define_constraint "Q"

  "A symbolic address loadable when ld24."

  (ior (and (match_test "TARGET_ADDR24")

            (match_test "GET_CODE (op) == LABEL_REF"))

       (match_test "addr24_operand (op, VOIDmode)")))

(define_constraint "R"

  "A symbolic address loadable with ld24 can't be used."

  (ior (and (match_test "TARGET_ADDR32")

            (match_test "GET_CODE (op) == LABEL_REF"))

       (match_test "addr32_operand (op, VOIDmode)")))

(define_constraint "S"

  "A store with pre {inc,dec}rement."

  (and (match_code "mem")

       (match_test "STORE_PREINC_PREDEC_P (GET_MODE (op), XEXP (op, 0))")))

(define_constraint "T"

  "An indirect of a pointer."

  (and (match_code "mem")

       (match_test "memreg_operand (op, GET_MODE (op))")))

(define_constraint "U"

  "A load with post increment."

  (and (match_code "mem")

       (match_test "LOAD_POSTINC_P (GET_MODE (op), XEXP (op, 0))")))

(define_constraint "W"

  "zero immediate."

  (and (match_code "const_int")

       (match_test "ival == 0")))